30-Year Treasury Yield Reaches 5.216% — Highest in 25 Years

A 30-year US Treasury bond auction settled at 5.216% on August 18, 2026 — a 25-year peak, per Reuters. A global bond selloff, driven by inflation and fiscal worries, pushed some yields to 19-year highs. The average 30-year fixed mortgage sat at 6.67% as of August 13, but the selloff's full impact on borrowing costs hasn't fully fed through yet.